TRIO KR-2120X
¥ 46,800 (around 1971)
Commentary
quadrix 4-channel receiver that allows you to listen to FM stereo broadcast transmission on 4 channels.
It is equipped with a matrix system quadrixer which can listen to all FM stereo broadcast transmission in 4 channels.
By using elements such as high-gain ICs and low-noise FETs, selectivity characteristics are improved.
Equipped with SCA filter.
Equipped with a pure electronic transistor protection circuit.
Model Rating
| Type | FM/AM Receiver | ||||
| Amplifier Unit | |||||
| Circuit type | Built-in matrix type 4-channel quad processor | ||||
| Music Power (IHF) | 34W (4 Ω) 30W (8 Ω) |
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| Effective power |
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| Harmonic distortion factor | 0.8% or Less (Rated Output) 0.2% or less (-3dB at rated output) |
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| Cross modulation distortion factor | 0.8% or Less (Rated Output) 0.2% or less (-3dB at rated output) |
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| Frequency characteristic | Main input : 20 Hz to 40 kHz ± 1.5 dB Aux : 25 Hz to 35 kHz ± 2 dB |
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| Output Bandwidth (IHF) | 25 Hz to 20 kHz | ||||
| Damping factor | 50 (8 Ω) | ||||
| Input Sensitivity / Impedance | Phono1, 2 : 2.5mV/50k Ω Aux, Tape play : 150 mv Main in:100mV |
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| Recording and re-outputting PIN/DIN | 180mV/36mV | ||||
| SN ratio (rated input) | Phono1, 2 : Aux, Tape play : 70 dB |
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| Tone control | ± 8 dB (100 Hz) ± 8 dB at 10 kHz |
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| Loudness control | +7dB(100Hz) | ||||
| FM Tuner Section | |||||
| Antenna impedance | 300 Ω balanced / 75 Ω unbalanced | ||||
| Sensitivity (IHF) | 2.3 μ V | ||||
| S/N | 60 dB or more | ||||
| Distortion Factor (400 Hz, 100% modulation) | Stereo : 0.9% or less Mono : not more than 0.7% |
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| Capture Ratio (IHF) | 4.0dB | ||||
| Selectivity (IHF) | 45 dB or more | ||||
| Image ratio | 60 dB or more | ||||
| IF Rejection | 100 dB or more | ||||
| AM suppression | 45 dB or more | ||||
| Harmonic spurious response | 70 dB or more | ||||
| Stereo separation | 30 dB or More (1 kHz) 20 dB or More (10 kHz) |
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| Subcarrier suppression | 40 dB or more | ||||
| Front end | 1 FET, 3 Series Varicon | ||||
| IF Stage | 1IC | ||||
| <AM Tuner Section> | |||||
| Antenna | Built-in high sensitivity ferrite bar antenna | ||||
| Sensitivity (IHF) | 25 μ V | ||||
| Selectivity (IHF) | 25 dB or more | ||||
| Image ratio | 45 dB or more | ||||
| IF Rejection | 35 dB or more | ||||
| Front end | Double Variator | ||||
| <General> | |||||
| Accessory function | Tape monitor Noise filter Loudness control |
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| Semiconductor used | Transistor : 25 FET : 1 IC : 3 Diode : 31 Units |
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| Pwer | 100 VAC / 117 V, 50Hz/60Hz | ||||
| Power consumption | 55W at maximum output 15W (No signal) |
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| External dimensions | Width 424x Height 133x Depth 314 mm | ||||
| Weight | 7.2kg | ||||